Supreme Court of Costa Rica The Supreme Court of Costa Rica rules that a ban on same-sex marriage is illegal, and states that legislators must change the law accordingly within eighteen months.
Terrorism in the United Kingdom Lewis Ludlow pleads guilty to financing and planning a terrorist van attack in London, England.
United Nations Development Group The United Nations General Assembly confirms Michelle Bachelet, former President of Chile, to succeed Zeid Raad Al Hussein as the UN High Commissioner for Human Rights. The decision to appoint her for a four-year term, starting September 1, was made by consensus after her nomination by UN Secretary-General António Guterres.
2017–2018 Romanian protests 452 people are injured in clashes between protesters and police during an anti-government meeting in Bucharest, Romania.
2018 Horizon Air Q400 incident An airport mechanic steals a Horizon Air Bombardier Q400 from Seattle–Tacoma International Airport in the United States, eventually crashing the plane on Ketron Island.
Glyphosate § Legal cases A jury in the U.S. state of California awards $289 million to a man who claims that his terminal cancer was caused by Monsanto's glyphosate-containing weed killer.
Fredericton shooting At least four people, including two police officers, are killed in a mass shooting in Fredericton, Canada.
Turkey–United States relations U.S. President Donald Trump authorizes the doubling of Section 232 tariffs on imports of aluminium and steel from Turkey, to 20% and 50% respectively. The Turkish lira further falls to a new record low against the U.S. dollar and Turkish stocks tumble.
Foreign relations of Colombia Colombia announces its withdrawal from the Union of South American Nations after having suspended its membership in the organization since April 2018.
War in Afghanistan A large-scale military offensive is launched by the Taliban in a bid to overrun the southeastern city of Ghazni, a provincial capital on the Kabul–Kandahar Highway. They manage to take control of a part of the city.